I got the CX3 and a red body that fits a CX2. I think it will fit but I have to get a piece of 2mm carbon rod and some tubing that fits snugly as gromets. Anyone tried this? The first feat will be getting the guts out of the CX3 body... lol

Is there a kit for this?

Yes, it'll fit since the body mounts are in the same spot. In fact, I don't think we still have a CX3 here with the stock body.